mysql away after sending email

Hello there,

I'm having a strange issue with my app that was built with rails

- I have a form where one employee can send a price quote to a client;
- the action just mark the quote as 'sent' on the database and deliver
the email;
- the email delivery is taking too long, about 45 second;
- after that the next action will show a 500 error;
- checking the logs I found it a mysql away error;

since I'm not delivering multiples emails and the client is waiting
for it's quote I see no reason for sending the email later, also,
everything was working fine before this smpt slowness...

does anyboby have any advice here?

thanks a lot!